also - i'm fairly sure lubrication would not have helped my problem - when this occurred, the top rear of the window would actually stick out well beyond where it should have been - and rattle like crazy. Not just a question of hitting resistance and rolling back down - it never made it all the way up when it would roll back down. In fact, there was nothing it was hitting when it rolled up - when the problem occurred (which was sporadic but was becoming more & more frequent), it was not just bouncing back, it was visibly OUT of the track when it reversed direction.....

Get the regulator changed if the problem is like this!